General GM ChatWhen starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.
Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Good luck finding anything over 91 out west :( For some reason 93 isn't as widespread as it is in the eastern US.

TRUE!!! that!!! I have the highest octane here in Minnesota that I am aware of.... 92 octane at the local Holiday, yet a local private gas station 2 blocks from me only has 91 octane, but I get better performance and economy from them.
AS for the west coast I am clueless..... maybe some race tracks might be open?

here in missourah, we have no sunocos. i like shell, but sometimes the price difference makes me feel ripped off sometimes. i also get phillips, mobil and sinclair. they all seem the same. i definatly notice a difference with QT gas(maybe cuz its 91 octane instead of 92/93?). i only go there if desperate.

Sometimes that "extra power" you feel after a fill up is because of the new cold gasoline you poured into the warm from ambient + returned fuel mixture in the tank. Colder fuel is denser and more efficient that hot fuel.

However, I do always fill up at well distributed fuel companies, I'm always paranoid of cheap gas stations, like they have crumby hoses and dirty rusty fuel tanks underground or something. Or lie about their octane levels.